Bolthole Index

Mercer County, Pennsylvania

Zoning, building permits and septic rules in Borough of West Middlesex, Pennsylvania

Borough of West Middlesex is a borough in Mercer County, Pennsylvania. Borough of West Middlesex adopts its own zoning, so inside its limits Borough of West Middlesex’s rules apply, not the county’s. 3 rules below are quoted from official sources and independently re-checked, most recently on November 12, 2026. Rules for unincorporated land are on the Mercer County page.

Answers from the rulebook for Borough of West Middlesex

Borough of West Middlesex’s own rules

  • Local zoningPresent

    Land inside West Middlesex borough, Mercer County, PA

    • Copy on the borough site is the 1996 final copy prepared with the Mercer County Regional Planning Commission; later amendments were not checked.
    “west middlesex borough mercer county pennsylvania ordinance no zoning ordinance an ordinance regulating and restricting”
  • Zoning districtsPublished

    Zoning districts inside West Middlesex borough

    • Districts: R-1, R-2, OB, DB, HC and I; a zoning map was not opened.
    “west middlesex borough is hereby divided into the following zoning districts: residential - single family residential - general residential commercial - downtown business - office building - highway commercial industrial - general industrial”
  • Manufactured homesLimited

    Mobilehomes inside West Middlesex borough where the zoning ordinance allows them

    • Must conform to all regulations applicable to single-family dwellings
    • Square footage is determined by the certificate of title; tipouts may be counted
    • Solid skirting required; cellar foundation or concrete pad/piers stand with tie-downs required
    • Which districts permit mobilehomes was not determined

    minimum mobilehome floor area: >= 750 sq ft

    “500.1: mobilehomes, provided: (a) self contained mobilehome units must have a floor area of 750 square feet or more, provided they conform to all regulations applicable to single-family dwellings.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Borough of West Middlesex or Mercer County directly.

  • Building permit — Building permits inside West Middlesex borough
  • Owner-builder exemption — Owner-builder exemption inside West Middlesex borough
  • Building code adopted — Building code inside West Middlesex borough
  • Inspections — Building inspections inside West Middlesex borough
  • Certificate of occupancy — Certificates of occupancy inside West Middlesex borough
22 more unanswered
  • Minimum dwelling size
  • Minimum lot size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Borough of West Middlesex publishes no rule on the point, not that none exists. Mercer County’s page lists the county offices to call.

Off-grid gear

Going off-grid in Borough of West Middlesex means bringing your own water and power. The kit we’d start with:

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